Obscuration of a Lunar Crater. 



447 



30 2G° 



v ._--' loo "'-, V _ i 



2 "— -\ r- ; - 1 i- 1 vAd 2 G ° 



30° 



20° 



AfOfiTH 

 THE MAKE SEEENITATIS, EBOM MADLEB'S SMALL MAP. 





Keferences. 







No. 30 



Plineus. 



49 



Le Mourner. 



„ 33 



Taquet. 



50 



Bessel. 



„ 34 



Menelaus. 



62 



Posidonius. 



„ 35 Sulpicius Grallus. 

 The interior clotted line, shows the boundary of the dark border of the Mare. 

 The exterior of the Mare, on the N. is not shown, as it is not so well marked as 

 the S.; the white streak, part of a ray from Tycho, across the Mare, is indicated 

 by the double dotted line, from Menelaus to the N. border. 



EECOEDED OBSEEYATIONS OE LINNE. 



1788, Nov. 5. Schroter. 



Dark spot in place of the Crater. 

 1823, May 28. Lohrmann. 



1 Measure. Always saw it brighter than Conon in the Apennines. 

 1813, Dec. 12, 13. Miidler. 



7 Measures. No remarks on its appearance. 

 1866, Oct., Nov. Schmidt. 



Obscured ; only a little whitish cloud visible. 



